BATTERY MODULE ASSEMBLY AND ASSEMBLING METHOD THEREOF
A battery module assembly with a plurality of unit modules stacked therein is provided. Each of the plurality of unit modules includes a cartridge including a cooling pin having a plate shape and two pouch type battery cells mounted on each of both side surfaces of the cooling pin with the cartridge therebetween. A partition having a tetragonal frame shape and including an internal empty space is disposed between adjacent unit modules among the plurality of unit modules.
Latest HYUNDAI MOBIS Co., Ltd. Patents:
This application claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2019-0102709, filed on Aug. 21, 2019, the disclosure of which is incorporated herein by reference in its entirety.
TECHNICAL FIELDThe present invention relates to a battery module assembly applied to vehicles.
BACKGROUNDReferring to
In
The related art battery module assembly 100 has the following problems.
First, in the related art battery module assembly 100, a cell cover 310 is manufactured as a high-strength exterior member including a synthetic resin or a metal material to surround a pair of battery cells (two battery cells) or three or more battery cells, and in this case, there is a problem where the high-strength exterior member should be again manufactured based on a thickness variation of a battery cell.
Second, although not shown in detail, an insert nut structure (an assembly structure) for assembling an upper detachable frame and a lower detachable frame and an insert bolt structure (a mounting structure) for mounting a battery module on an inner portion of a vehicle are needed, a battery module size increases and the number of elements increases.
Third, a lower frame member 500 is manufactured by an injection process, but a limitation of the injection process causes a phenomenon (a rib bending phenomenon) where a vertical partition wall part (rib) configuring the lower frame member 500 is inward contracted like a direction of a dotted arrow illustrated in
Accordingly, the present invention provides a battery module assembly and an assembling method thereof, which enable a battery module to be assembled, solve a problem where a battery module size and the number of elements increase, based on a cartridge, and decrease a total assembly time, regardless of a thickness variation of a battery cell.
In one general aspect, in a battery module assembly with a plurality of unit modules stacked therein, each of the plurality of unit modules includes: a cartridge including a cooling pin having a plate shape; and two pouch type battery cells mounted on each of both side surfaces of the cooling pin with the cartridge therebetween, wherein a partition having a tetragonal frame shape and including an internal empty space is disposed between adjacent unit modules among the plurality of unit modules.
In another general aspect, a method of manufacturing a battery module assembly with a plurality of unit modules stacked therein includes: mounting a battery cell on both side surfaces of a cooling pin having a plate shape with a cartridge, including the cooling pin, therebetween to configure a unit module; stacking another unit module on the unit module with a partition, having a tetragonal frame shape and including an internal empty space, therebetween; and assembling the unit module, the other unit module, and the partition by using a fastening means passing through a guide hole provided in one end portion of each of the unit module, the other unit module, and the partition.
In another general aspect, in a battery module assembly with a plurality of cartridges stacked therein, each of the plurality of cartridges includes: a cooling pin having a plate shape, a pouch type battery cell being attached on each of both side surfaces of the cooling pin; and a frame configuring a border of the cooling pin, wherein the battery module assembly further includes a partition having a tetragonal frame shape and filling an interval between a frame of a cartridge and a frame of another cartridge adjacent to the cartridge.
Other features and aspects will be apparent from the following detailed description, the drawings, and the claims.
Hereinafter, example embodiments of the present invention will be described in detail with reference to the accompanying drawings. Embodiments of the present invention are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the present invention to one of ordinary skill in the art. Since the present invention may have diverse modified embodiments, preferred embodiments are illustrated in the drawings and are described in the detailed description of the present invention. However, this does not limit the present invention within specific embodiments and it should be understood that the present invention covers all the modifications, equivalents, and replacements within the idea and technical scope of the present invention. Like reference numerals refer to like elements throughout.
The term “unit module” may be used herein, and a unit module will be described below in detail and may be used as a concept including two battery cells disposed at both sides of one cartridge therebetween. The term “unit module” may be referred to as the term “cartridge”, and in this case, the term “cartridge” may be construed as a concept including two battery cells.
Moreover, a structural/functional feature between two adjacent unit modules or two adjacent cartridges are described in claims, but this is for clearly representing technical features defined in the claims and the claims are not limited to a battery module assembly configured with only two adjacent unit modules or two adjacent cartridges.
Referring to
The stacked plurality of unit modules 110 may be assembled by a fastening means 120 (122 and 124) such as a long bolt. Here, the fastening means 120 (122 and 124) may include, for example, long bolts.
Two long bolts 122 and 124 may pass through a plurality of guide holes which are formed in one end portion and the other end portion of a cartridge included in each unit module and may fasten the plurality of unit modules 110.
A surface pressure applied to a battery cell may be generated in a fastening (assembling) process and may prevent a swelling phenomenon where the battery cell swells, thereby increasing a lifetime of a battery module.
The battery module assembly 100 according to an embodiment of the present invention, as illustrated in
The partition 119 may compensate for a thickness of a battery cell included in each of the plurality of unit modules 10. That is, the partition 119 may act as a spacer for maintaining an interval between adjacent unit modules (an interval between cartridges).
The partition 119 may be previously manufactured to have various widths. Therefore, a cartridge suitable for a thickness may not be injected whenever a thickness of a battery cell is changed, and an interval between the unit modules may be maintained by using the partition 119 selected from among the plurality of partitions 119 which are previously manufactured to have various widths, whereby a battery module may be configured regardless of the thickness of the battery cell. The partitions 119 will be described below in detail.
Each of the unit modules may include one cartridge, and as illustrated in
The cartridges A, B, C, and D may have a slight difference therebetween on the basis of a design shape, but a whole shape thereof may be a rectangular shape. Similarly, the partition 119 may also be implemented in a rectangular shape.
The cartridges A, B, C, and D will be described below. There may be a difference between outer shapes in that an inner portion of each of the cartridges A, B, C, and D is plugged by a plate-shaped cooling pin and the partition 119 is implemented in a tetragonal frame shape where an inner portion thereof is empty.
Moreover, a structure is illustrated where two cartridges B are stacked between two adjacent cartridges C, but the present invention is not limited thereto. In other embodiments, the cartridges B and C except the cartridges A and D may be configured so that the number and arrangement of cartridges are changed based on a configuration of a battery module, a mounting structure and a configuration of a battery module may be differently implemented.
Hereinafter, a structure of a unit module will be described in detail.
As illustrated in
As illustrated in
The cooling pin 111A-1 may be provided in a rectangular plate shape and may function as a heat dissipation plate for the battery cells 111B and 111C.
A plurality of adhesive means (111A-2 and 111A-3 of
As illustrated in
A guide-hole pin structure 3 through which a long bolt (122 of
A shape and a structure of the cartridge A disposed at the left outermost portion illustrated in
The cartridge A and the cartridges B and C illustrated in
For example,
A shape and a structure of the cartridge B may be very similar to those of the cartridge C, and thus, the description of the unit module including the cartridge C may be applied to a unit module including the cartridge B.
Unlike the cartridge B, the cartridge C may have a difference in that the cartridge C further includes an insertion hole 115-4 into which a temperature sensor for sensing a temperature of the cooling pin 115-1 is inserted. For example, as illustrated in
The number and arrangement (stacked order) of cartridges B may differ from the number and arrangement (stacked order) of cartridges C, based on a configuration of a module. Therefore, by differently changing the number and arrangement of cartridges C on which a temperature sensor is capable of being mounted, the number of position of temperature sensors capable of being applied to a module may be freely adjusted.
Moreover, as illustrated in
Similarly, although not shown, a guide hole through which the long bolt 122 passes may be provided in one end portion of each of frames configuring short sides in the cartridge B.
A partition disposed between the cartridge C and the cartridge B is illustrated in
The partition 119 may have a tetragonal frame shape where an inner portion thereof is empty and may compensate for a thickness of a battery cell included in each unit module. Also, the partition 119 may define a space where a surface pressure member 130 is disposed between (between battery cells) a unit module including the cartridge C and a unit module including the cartridge B.
Referring to
A guide-hole pin structure 7 through which a long bolt (122 of
Referring to
A width W (or a width of a frame) of the partition 119 may be variously manufactured to compensate for a thickness variation of a battery cell included in each unit module. That is, a plurality of partitions 119 having various widths may be previously manufactured, and then, the partition 119 having the width W for compensating for a thickness of a battery cell may be selected whenever a thickness of a battery cell varies.
As illustrated in
In order to compensate for such an interval, the partition 119 may be disposed between the cartridge 1 and the cartridge 2 (between adjacent unit modules). In this case, the partition 119 having the width W corresponding to the interval between the cartridges 1 and 2 may be selected from among a plurality of partitions previously manufactured to have various widths, and the selected partition 119 may fill the interval between the cartridges 1 and 2. Accordingly, a battery module may be configured regardless of a thickness of a battery cell.
The internal space of the partition 119 may define a space where a surface pressure pad 130 is disposed. As illustrated in
Because the surface pressure pad 130 are disposed between adjacent unit modules (or between battery cells C2 and C3), the surface pressure pad 130 may prevent a swelling phenomenon where a battery cell swells, thereby increasing a lifetime of a battery module.
The surface pressure pad 130 may include a material has elasticity, for preventing a battery cell from being damaged by an excessive surface pressure, and for example, may include a plastic material.
First, referring to
The sensing assembly 200, as illustrated in
Referring to
Referring to
Referring to
Subsequently, a process of calculating an interval between a cartridge (the cartridge 1 of
Subsequently, a process of selecting a partition having a width (W of
Subsequently, a process of placing the selected partition (119 of FIGS. 11 to 14) and a surface pressure pad (130 of
Subsequently, a process of assembling the adjacent cartridges and the partition disposed therebetween by using long bolts (120 of
In an assembly where assembling based on a long bolt is completed, as illustrated in
As described above, unlike the related art, according to the embodiments of the present invention, instead of configuring a unit module by using a cell cover surrounding all of battery cells, a unit module may be configured by mounting battery cells on both sides of a cartridge, thereby solving inconvenience where a cell cover should be again manufactured whenever a thickness of each battery cell is changed.
Moreover, an interval between cartridges occurring due to a thickness variation of each battery cell may be simply compensated for by using a partition having a simple structure, and thus, convenience in assembling of a module may be considerably enhanced.
Moreover, a surface pressure pad may be disposed between a battery cell included in a unit module and another battery cell included in another unit module adjacent thereto by using an internal empty space of a partition, and thus, the surface pressure pad may transfer a surface pressure, generated in a fastening process, to a battery cell, thereby preventing a swelling phenomenon of a battery cell to increase a lifetime in use.
In the battery module assembly according to the embodiments of the present invention, a unit module may include one cartridge and two battery cells assembled with the one cartridge therebetween, and a plurality of unit modules may be assembled in a horizontal direction, thereby removing a cell cover (310 of
Moreover, in the battery module assembly according to the embodiments of the present invention, two battery cells configuring a unit module may be fixed to both surfaces of a cooling pin included in one cartridge disposed between the two battery cells by using an adhesive means such as a double-sided tape, and thus, a unit module may be configured by a very simple method even without a cell cover configuring a unit module in the related art battery module assembly.
Moreover, according to the embodiments of the present invention, because a unit module is configured by a simple method, convenience for assembling a plurality of unit modules may be provided.
Moreover, according to the embodiments of the present invention, a cooling pin included in one cartridge disposed between two battery cells may cool the two battery cells, thereby increasing the thermal conductivity of a battery module.
Moreover, in the battery module assembly according to the embodiments of the present invention, a surface pressure pad may be disposed between adjacent unit modules, and a plurality of unit modules may be fastened by using a fastening means such as a long bolt passing through a guide hole which is formed in one stepped portion of a cartridge included in each unit module, and a surface pressure generated in a fastening process may be transferred to a battery cell through the surface pressure pad, thereby increasing a lifetime of the battery cell.
A number of exemplary embodiments have been described above. Nevertheless, it will be understood that various modifications may be made. For example, suitable results may be achieved if the described techniques are performed in a different order and/or if components in a described system, architecture, device, or circuit are combined in a different manner and/or replaced or supplemented by other components or their equivalents. Accordingly, other implementations are within the scope of the following claims.
Claims
1. A battery module assembly with a plurality of unit modules stacked therein, each of the plurality of unit modules comprising:
- a cartridge including a cooling pin having a plate shape; and
- two pouch type battery cells mounted on each of both side surfaces of the cooling pin with the cartridge therebetween,
- wherein a partition having a tetragonal frame shape and including an internal empty space is disposed between adjacent unit modules among the plurality of unit modules.
2. The battery module assembly of claim 1, wherein the two pouch type battery cells are fixed to and attached on both side surfaces of the cooling pin by a double-sided tape.
3. The battery module assembly of claim 1, wherein
- the partition is disposed between a cartridge included in a unit module and another cartridge included in another unit module adjacent to the unit module, and
- the partition has a width for compensating for an interval between the cartridge and the other cartridge occurring due to a difference between a total thickness of the two pouch type battery cells and the cartridge.
4. The battery module assembly of claim 1, further comprising a surface pressure pad disposed between a battery cell included in a unit module and another battery cell included in another battery cell adjacent to the unit module.
5. The battery module assembly of claim 4, wherein the surface pressure pad is disposed between the battery cell and the other battery cell through the internal empty space of the partition.
6. The battery module assembly of claim 4, wherein the surface pressure pad transfers a surface pressure, generated in a process of fastening the plurality of unit modules, to a battery cell to prevent a swelling phenomenon of the battery cell
7. The battery module assembly of claim 4, wherein the surface pressure pad comprises a material having elasticity.
8. The battery module assembly of claim 1, wherein, by using a fastening means passing through a guide hole provided in one end portion of a cartridge included in a unit module, a guide hole provided in one end portion of the partition, and a guide hole provided in one end portion of another cartridge included in another unit module adjacent to the unit module, the cartridge, the partition, and the other cartridge are assembled.
9. The battery module assembly of claim 1, wherein a cartridge included in some of the plurality of unit modules comprises an insertion hole into which a temperature sensor for sensing a temperature of a cooling pin is inserted.
10. A method of manufacturing a battery module assembly with a plurality of unit modules stacked therein, the method comprising:
- mounting a battery cell on both side surfaces of a cooling pin having a plate shape with a cartridge, including the cooling pin, therebetween to configure a unit module;
- stacking another unit module on the unit module with a partition, having a tetragonal frame shape and including an internal empty space, therebetween; and
- assembling the unit module, the other unit module, and the partition by using a fastening means passing through a guide hole provided in one end portion of each of the unit module, the other unit module, and the partition.
11. The method of claim 10, wherein the configuring of the unit module comprises fixing and attaching the battery cell on the both side surfaces of the cooling pin by using a double-sided tape.
12. The method of claim 10, wherein the stacking of the other unit module on the unit module comprises:
- placing a surface pressure pad between a battery cell included in the unit module and another battery cell included in the other unit module; and
- stacking the battery cell, the surface pressure pad, and the other battery cell through the internal empty space of the partition.
13. The method of claim 10, wherein the assembling of the unit module and the other unit module comprises assembling the unit module, the other unit module, and the partition by using a long bolt passing through the guide hole.
14. The method of claim 10, further comprising inserting a temperature sensor, contacting the cooling pin, into an insertion hole provided in a cartridge included in one of the unit module and the other unit module.
15. A battery module assembly with a plurality of cartridges stacked therein, each of the plurality of cartridges comprising:
- a cooling pin having a plate shape, a pouch type battery cell being attached on each of both side surfaces of the cooling pin; and
- a frame configuring a border of the cooling pin,
- wherein the battery module assembly further comprises a partition having a tetragonal frame shape and filling an interval between a frame of a cartridge and a frame of another cartridge adjacent to the cartridge.
16. The battery module assembly of claim 15, further comprising a surface pressure pad disposed, through the internal empty space of the partition, between a pouch type battery cell attached on one side surface of a cooling pin of the cartridge and a pouch type battery cell attached on one side surface of a cooling pin of the other cartridge.
17. The battery module assembly of claim 15, wherein the pouch type battery cell is fixed to and attached on both side surfaces of the cooling pin by a double-sided tape.
18. The battery module assembly of claim 15, wherein the frame comprises an insertion hole into which a temperature sensor for sensing a temperature of a cooling pin is inserted.
19. The battery module assembly of claim 15, wherein
- a guide hole provided in one end portion of each of a frame of the cartridge, the partition, and a frame of the other cartridge, a long bolt passing through the guide hole, and
- the frame of the cartridge, the partition, and the frame of the other cartridge are assembled by the long bolt passing through the guide hole.
Type: Application
Filed: Aug 20, 2020
Publication Date: Feb 25, 2021
Patent Grant number: 11637338
Applicant: HYUNDAI MOBIS Co., Ltd. (Seoul)
Inventor: Ki Hyeon KIM (Yongin-si)
Application Number: 16/998,946